Civil Engineering

Characteristic of a structure that collapses or deforms under a realistic load or a chemical that decomposes.

Nuclear and Particle Physics

Matter that is capable of undergoing spontaneous change, as in a radioactive nuclide or an excited nuclear system. An unstable particle is any elementary particle that spontaneously decays into other particles.

See also: Equilibrium, Instability, Stable.

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Subjects: Chemistry Civil Engineering Nuclear and Particle Physics